正如标题所述，我想打开一个片段，它位于activity中（非AppCompatActivity）

代码:

TableFragment fragment = new TableFragment();
  fragment.setArguments(bundle);
  View view = (View) findViewById(R.id.Example);
  AppCompatActivity activity = (AppCompatActivity) view.getContext().getApplicationContext();
  FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
  ft.replace(R.id.idFragment, fragment);
  ft.commit();

错误:原因:

java.lang.ClassCastException: android.app.Application cannot be cast to androidx.appcompat.app.AppCompatActivity

还尝试了:

Activity activity = (Activity) this;
FragmentManager fragmentManager = activity.getFragmentManager();
FragmentTransaction ft= fragmentManager.beginTransaction();
TableFragment fragment = new TableFragment();
ft.replace(R.id.idFragment, fragment);
ft.commit();

错误:

Required type: androidx.fragment.app.FragmentTransaction
Provided: android.app.FragmentTransaction

问题:如何在activity中打开片段（非AppCompatActivity）？